/* ----------------------------------------------------------------------------
 * Copyright (c) Huawei Technologies Co., Ltd. 2013-2019. All rights reserved.
 * Description: SortLink
 * Author: liulei
 * Create: 2013-01-01
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * --------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------------
 * Notice of Export Control Law
 * ===============================================
 * Huawei LiteOS may be subject to applicable export control laws and regulations, which might
 * include those applicable to Huawei LiteOS of U.S. and the country in which you are located.
 * Import, export and usage of Huawei LiteOS in any manner by you shall be in compliance with such
 * applicable export control laws and regulations.
 * --------------------------------------------------------------------------- */

#include "los_base.h"
#include "los_memory.h"
#include "los_sortlink_pri.h"
#ifdef LOSCFG_LIB_LIBC
#include "string.h"
#endif

#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif
#endif /* __cplusplus */

LITE_OS_SEC_TEXT_INIT UINT32 OsSortLinkInit(SortLinkAttribute *sortLinkHeader)
{
    UINT32 size;
    LOS_DL_LIST *listObject = NULL;
    UINT32 index;

    size = sizeof(LOS_DL_LIST) << OS_TSK_SORTLINK_LOGLEN;
    listObject = (LOS_DL_LIST *)LOS_MemAlloc(m_aucSysMem0, size);
    if (listObject == NULL) {
        return LOS_NOK;
    }

    (VOID)memset_s((void *)listObject, size, 0, size);
    sortLinkHeader->sortLink = listObject;
    sortLinkHeader->cursor = 0;
    for (index = 0; index < OS_TSK_SORTLINK_LEN; index++, listObject++) {
        LOS_ListInit(listObject);
    }
    return LOS_OK;
}

LITE_OS_SEC_TEXT VOID OsAdd2SortLink(SortLinkAttribute *sortLinkHeader, SortLinkList *sortList)
{
    SortLinkList *listSorted = NULL;
    LOS_DL_LIST *listObject = NULL;
    UINT32 sortIndex;
    UINT32 rollNum;
    UINT32 timeout;

    /*  huge rollnum could cause carry to invalid high bit
        and eventually affect the calculation of sort index */
    if (sortList->idxRollNum > OS_TSK_MAX_ROLLNUM) {
        SET_SORTLIST_VALUE(sortList, OS_TSK_MAX_ROLLNUM);
    }

    timeout = sortList->idxRollNum;

    sortIndex = timeout & OS_TSK_SORTLINK_MASK;
    rollNum = (timeout >> OS_TSK_SORTLINK_LOGLEN) + 1;
    (sortIndex > 0) ? 0 : (rollNum--);
    EVALUATE_L(sortList->idxRollNum, rollNum);

    sortIndex = (sortIndex + sortLinkHeader->cursor);
    sortIndex = sortIndex & OS_TSK_SORTLINK_MASK;
    EVALUATE_H(sortList->idxRollNum, sortIndex);

    listObject = sortLinkHeader->sortLink + sortIndex;
    if (listObject->pstNext == listObject) {
        LOS_ListTailInsert(listObject, &sortList->sortLinkNode);
    } else {
        listSorted = LOS_DL_LIST_ENTRY((listObject)->pstNext, SortLinkList, sortLinkNode); /*lint !e413*/
        do {
            if (UWROLLNUM(listSorted->idxRollNum) <= UWROLLNUM(sortList->idxRollNum)) {
                UWROLLNUMSUB(sortList->idxRollNum, listSorted->idxRollNum);
            } else {
                UWROLLNUMSUB(listSorted->idxRollNum, sortList->idxRollNum);
                break;
            }

            listSorted = LOS_DL_LIST_ENTRY(listSorted->sortLinkNode.pstNext, SortLinkList, sortLinkNode); /*lint !e413*/
        } while (&listSorted->sortLinkNode != (listObject));

        LOS_ListTailInsert(&listSorted->sortLinkNode, &sortList->sortLinkNode);
    }
}

LITE_OS_SEC_TEXT VOID OsDeleteSortLink(SortLinkAttribute *sortLinkHeader, SortLinkList *sortList)
{
    LOS_DL_LIST *listObject = NULL;
    SortLinkList *nextSortList = NULL;
    UINT32 sortIndex;

    sortIndex = UWSORTINDEX(sortList->idxRollNum);
    listObject = sortLinkHeader->sortLink + sortIndex;

    if (listObject != sortList->sortLinkNode.pstNext) {
        nextSortList = LOS_DL_LIST_ENTRY(sortList->sortLinkNode.pstNext, SortLinkList, sortLinkNode);
        UWROLLNUMADD(nextSortList->idxRollNum, sortList->idxRollNum);
    }
    LOS_ListDelete(&sortList->sortLinkNode);
}

LITE_OS_SEC_TEXT STATIC UINT32 OsCalcExpierTime(UINT32 rollNum, UINT32 sortIndex, UINT16 curSortIndex)
{
    UINT32 expireTime;

    if (sortIndex > curSortIndex) {
        sortIndex = (UINT32)(sortIndex - (UINT32)curSortIndex);
    } else {
        sortIndex = (UINT32)(OS_TSK_SORTLINK_LEN - (UINT32)curSortIndex + sortIndex);
    }
    expireTime = ((rollNum - 1) << OS_TSK_SORTLINK_LOGLEN) + sortIndex;
    return expireTime;
}

LITE_OS_SEC_TEXT UINT32 OsSortLinkGetNextExpireTime(SortLinkAttribute *sortLinkHeader)
{
    UINT16 cursor;
    UINT32 minSortIndex = 0xFFFFFFFF;
    UINT32 minRollNum = OS_TSK_LOW_BITS_MASK;
    UINT32 expireTime = 0xFFFFFFFF;
    LOS_DL_LIST *listObject = NULL;
    SortLinkList *listSorted = NULL;
    UINT32 i;

    cursor = (sortLinkHeader->cursor + 1) & OS_TSK_SORTLINK_MASK;

    for (i = 0; i < OS_TSK_SORTLINK_LEN; i++) {
        listObject = sortLinkHeader->sortLink + ((cursor + i) & OS_TSK_SORTLINK_MASK);
        if (!LOS_ListEmpty(listObject)) {
            listSorted = LOS_DL_LIST_ENTRY((listObject)->pstNext, SortLinkList, sortLinkNode); /*lint !e413*/
            if (minRollNum > UWROLLNUM(listSorted->idxRollNum)) {
                minRollNum = UWROLLNUM(listSorted->idxRollNum);
                minSortIndex = (cursor + i) & OS_TSK_SORTLINK_MASK;
            }
        }
    }

    if (minRollNum != OS_TSK_LOW_BITS_MASK) {
        expireTime = OsCalcExpierTime(minRollNum, minSortIndex, sortLinkHeader->cursor);
    }

    return (UINT32)expireTime;
}

LITE_OS_SEC_TEXT VOID OsSortLinkUpdateExpireTime(UINT32 sleepTicks, SortLinkAttribute *sortLinkHeader)
{
    SortLinkList *sortList = NULL;
    LOS_DL_LIST *listObject = NULL;
    UINT32 i = 0;
    UINT32 sortIndex;
    UINT32 rollNum;
    if (sleepTicks == 0) {
        return;
    }
    sortIndex = sleepTicks & OS_TSK_SORTLINK_MASK;
    rollNum = (sleepTicks >> OS_TSK_SORTLINK_LOGLEN) + 1;
    (sortIndex > 0) ? 0 : (rollNum--);

    for (i = 0; i < OS_TSK_SORTLINK_LEN; i++) {
        listObject = sortLinkHeader->sortLink + ((sortLinkHeader->cursor + i) & OS_TSK_SORTLINK_MASK);

        if (listObject->pstNext != listObject) {
            sortList = LOS_DL_LIST_ENTRY((listObject)->pstNext, SortLinkList, sortLinkNode);
            if (sortIndex == 0) {
                sortIndex = OS_TSK_SORTLINK_LEN;
            }
            UWROLLNUMSUB(sortList->idxRollNum, rollNum - 1);
            if (i > 0 && i < sortIndex) {
                UWROLLNUMDEC(sortList->idxRollNum);
            }
        }
    }
    sortLinkHeader->cursor = (sortLinkHeader->cursor + sleepTicks - 1) % OS_TSK_SORTLINK_LEN;
}

LITE_OS_SEC_TEXT_MINOR UINT32 OsSortLinkGetTargetExpireTime(SortLinkAttribute *sortLinkHeader,
                                                            SortLinkList *targetSortList)
{
    SortLinkList *listSorted = NULL;
    LOS_DL_LIST *listObject = NULL;
    UINT32 sortIndex = UWSORTINDEX(targetSortList->idxRollNum);
    UINT32 rollNum = UWROLLNUM(targetSortList->idxRollNum);

    listObject = sortLinkHeader->sortLink + sortIndex;

    listSorted = LOS_DL_LIST_ENTRY((listObject)->pstNext, SortLinkList, sortLinkNode); /*lint !e413*/
    while (listSorted != targetSortList) {
        rollNum += UWROLLNUM(listSorted->idxRollNum);
        listSorted = LOS_DL_LIST_ENTRY((listSorted->sortLinkNode).pstNext, SortLinkList, sortLinkNode);
    }
    return OsCalcExpierTime(rollNum, sortIndex, sortLinkHeader->cursor);
}

#ifdef __cplusplus
#if __cplusplus
}
#endif
#endif /* __cplusplus */
